河南科技HenanScienceandTechnology机械与动力工程总第800期第6期2023年3月进气迟闭角和气门角面值对压缩比的影响分析郭才冬邓真（重庆宗申发动机制造有限公司，重庆400054）摘要：【目的目的】通过对发动机配气机构的进气迟闭角在低转速时与发动机压缩比的关系进行研究，建立进气迟闭角与发动机压缩比的关系式，为发动机启动缸压设计开发提供理论支持。【方法】本研究对发动机有效压缩比与曲轴转角及气门角面值的关系式进行推导，采用平均角面值占比结合曲轴转角来计算发动机低转速有效压缩比的方法，并通过试验来验证该公式的正确性。【结果结果】本研究建立的迟闭角与发动机压缩比关系式，为发动机研究人员提供启动缸压设计的基本计算方法。【结论结论】通过计算并结合试验得出，发动机在低转速时，用进气平均流通面积和进气迟闭角联立来求解发动机的有效压缩比，所得的结果与实际压缩比相符。关键词：进气迟闭角；气门角面值；压缩比中图分类号：TK417文献标志码：B文章编号：1003-5168（2023）06-0045-04DOI：10.19968/j.cnki.hnkj.1003-5168.2023.06.008AnalysisoftheImpactofIntakeLagAngleandAngle-AreaValveonCompressionRatioGUOCaidongDENGZhen(ChongQingzongshenenginemanufactureCo.,Ltd.,Chongqing400054,China)Abstract:[Purposes]Bystudyingtherelationshipbetweentheintakelagangleoftheenginevalvetrainandtheenginecompressionratioatlowspeed,therelationshipbetweentheintakelagangleandtheen⁃ginecompressionratioisestablishedtoprovidetheoreticalsupportforthedesignanddevelopmentofen⁃ginestartingcylinderpressure.[Methods]Inthisstudy,therelationshipbetweentheeffectivecompres⁃sionratiooftheengineandthecrankshaftangleandthevalveanglesurfacevaluewasderived.Themethodofcalculatingtheeffectivecompressionratiooftheengineatlowspeedwascalculatedbyusingtheaverageanglesurfacevalueratiocombinedwiththecrankshaftangle,andthecorrectnessofthefor⁃mulawasverifiedbyexperiments.[Findings]Therelationshipbetweenthelagangleandtheenginecom⁃pressionratioestablishedinthisstudyprovidesengineresearcherswithabasiccalculationmethodforstartingcylinderpressuredesign.[Conclusions]Throughcalculationandexperiment,itisconcludedthatwhentheengineisatlowspeed,theeffectivecompressionratioo...
